Quick opening devices for dry pipe valves for fire protection service 防火设施用干管阀门的快速开启装置
At virginia tech , emergency services reacted quickly after two people were killed early that morning 在弗吉尼亚理工大学,当紧急服务快速开启后,造成2人死亡早晨。
Fast - opening blind is applied in the circular hatch of pressure pipeline and pressure vessel , which can be opened and closed fast 快开盲板是用于压力管道或压力容器的圆形开口上并能实现快速开启和关闭的一种机械装置。
In the hydraulic transmission systems , after the valve is suddenly open and shut off , there will be a fluid transient in the form of pressure pulsation propagating along the pipeline 液压系统中,阀门的快速开启或关闭会在管路中发生压力瞬态脉动过程。
Electronic sensor system seems slightly inadequate , particularly lack of rapid opening butterfly - lock - twisting in cockpit . repairation is very tedious once the transient is fault 电子传感系统略显不足,特别是机舱内缺乏快速开启蝶型锁扭。一旦出现暂时性故障,修复十分繁琐。
A comparison of the flows with different gate - opening rates shows the causes that opening the gate at a higher rate is favorable to the reduction of cavitation , gate vibration as well as the gate load fluctuation . in addition , a study has been made to show the influence of the high - speed jet flow coming downward from the narrow gate gap on the flow condition in the tunnel downstream to the gate 通过分析比较不同阀门开启速率对流动特性的影响,阐明了快速开启阀门不仅有利于减少空化空蚀也有利于减小弧门振动和启门力的脉动,此外,研究了门楣处狭窄缝隙高速射流对门后流态、压力脉动和弧门受力等方面的影响。